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大功率齿轮传动的工作特点是高速重载,传递的功率通常在上万马力,有时达6～8万马力;齿轮圆周速度达30～80m/s,个别可达150～200m/s。为了降低齿轮圆周速度,设计齿轮时,在强度许可前提下,一般尽量把小齿轮节圆直径缩小。这样,齿轮宽度就比节圆直径大得多,通常齿宽与小齿轮节径之比(2b/d称为宽径比)在1.5～2.5之间。这样细长的轴齿轮在传递扭矩时,轮齿会产生扭曲,它会使沿齿长方向的载荷分布不均匀。若取沿齿长最大载荷与平均载荷的
High-power gear transmission is characterized by high-speed heavy-duty, the power is usually delivered in the tens of thousands of horsepower, sometimes up to 80,000 horsepower; gear circumferential speed of 30 ~ 80m / s, up to 150 ~ 200m / s. In order to reduce the circumferential speed of the gear, when designing the gear, under the premise of the strength permission, it is generally preferable to reduce the diameter of the pinion pitch circle. In this way, the gear width is much larger than the pitch circle diameter, usually tooth width and pinion pitch ratio (2b / d is called aspect ratio) between 1.5 ~ 2.5. Such slender shaft gear in the torque transmission, the gear teeth will be distorted, it will make the load distribution along the tooth length direction is not uniform. If taken along the tooth maximum load and average load